Body for use in electrolysis



May 8, 1934. O CQNRADTY 1,957,940

BODY FOR USE IN ELECTROLYSIS Filed June 4, 1929 Patented May 8, i934 UNITED STA Application June 1,957,940 BODY FOR USE IN ELECTROLYSHS Ottmar Conradty, Nuremberg, -Germany In Germany 4, 1929. Serial No. 368,308

November 23, 1928 3 Claims. (fill. 294-4) such parts where the plates and the in close contact with each other.

comparatively weak are screw-threads which are rapidly corroded, so that the pl of fall from the rods before they are completely.

rods are'not Thereby the ates or parts thereconsumed. When thus a part. of the platesfalls from the rods the efiective area of the electrodes is reduced which results in an increased resistance of the bath and an density, and the consumption of an electrode and a method of increase of the current whereby the plates are rapidly destroyed graphite isincreased.

The object of the improvements is to providemanufacturing the same in which the said objections are obviated,

and with this object in view my invention consists in providing an-electrode in which any spaces between the plates and fillin In the practice medium consists of a material is plastic and the rods are avoided by the same with a suitable filling medium. of theinvention the said filling such as wax which can be made liquid for example by heating, and which is of a nature such that it is not affected by electrolysis.

For the purpose of explaining the invention a part of an electrode is illustrated in the ac-- companying drawing showing tion of the said part of the ele a sectional elevactrode.

In carrying out the invention a suitable fill ing medium such as wax, of different sorts is molten,

ceresin,

the rods are heated etc. or mixtures particularly at the screw-threaded ends and coated with the said ceresin. Thereafter, the rods arescrewed into the holesmade in the plates, which are likewise threaded ends of the rods bein heated, the screwg preferably highly heated immediately before screwing the same into the holes by means of make the coating as mixtures thereof of not made perfectly a soldering flame in order to fluent as possible. Wax or the character indicated are fluent by, being heated so that, the material is not completely absorbed by the graphite but there remain the screw-threads.

s a thin coating on PATENT? oF-Fica By rapidly and tightly screwing the rods into the bores an intimate contact is produced be-v tween the surfaces of the threads, and simultaneously the, wax adhering to the threads is pressed away thus collecting within the small interstices formed at the bottom side -of the threads of the rods and completely filling the same where it is solidified. In the figure the letter a indicates the plate, the letter I) the rod,

and the letter 0 indicates the wax between the bottom faces of the threads of the rod 1) and the adj acent faces of the threads of the plates a. As appears from the figure, all the interstices between the rod and the plate are completely filled,

so that there is no electrolysis at such parts which would destroy the threads. I have found that by thus constructing the electrodes the plates are not liable to fall from the rods, and that electrodes made my improved method according to can be almost completely used up, which results in a considerable saving of expensive graphite material. Further, I have found that the resistance between the plate and the rod is not increased, and that as fact the average initial voltage of the bath a matter of reduced by a few tenths of a volt, and that thereafter in the course of the operation the voltage of the bath is considerably reduced as compared to electrodes now in use,

the beginning the objectionable electrolysis the reason being that from which consumes electric energy is obviated. Heretofore the said objectionable electrolysis used to increase in the course thereby the contactin the plate were reduced. For further reducing of the operation, because g surfaces of the'rod and the resistance between the plate a and the rod 1) I use a wax which is filled with a suitable for example as finely conducting material such groundgraphite, the said graphite being adapted to render the filling material moreor less conductive:

I claim:

1. The herein described body for use in electrolysis comprising a plate formed with an internally screw-threaded bore, a rod screwing-in the said bore, and adapted to support said plate, and wax in mixture with ground graphite filling the interstices between the upper sides of the screw-threads of the plate and the under sides of i the screw threads of the rod.

2. The method of making a body for use in electrolysis substantially invulnerable to local electrolyses, comprising taking a plate of graphite, making a screw-threaded bore in the plate,

applying a coating 0 f wax to the end of the 0 graphite rod, heating the plate and heating the end of the rod, and screwing the rod into said bore, whereby the wax filling material will fill the interstices between the upper sides of the 5 screw threads 61' the plate and the under sides of the rod. t

3. The herein described body for use in electrolysis, comprising a plate formed with an in- 

